I can confirm it's true. In particular, it tries to connect to two google cloud servers at:
from port 59946 to 35.190.78.8 from port 54192 to: 35.227.244.186
Furthermore, btdmaster's original comment regarding this was censored, which lends even more crediblity to claims, and that something very fishy is behind this.
I've played plenty of KSP, and when you launch the game the first time there's a popup where you have to agree to have your privacy violated (there's a link to iirc unity analytics where you can supposedly opt out, but it always gave me a page error when I tried to go there. In Linux, it wouldn't even launch the browser and it doesn't give you the URL, so it would be impossible to opt out even if it worked).
Their integration with the redshell spyware is well documented too.